What is split horizon?

Question - What is split horizon?

Options:

A . Information about a route should not be sent back in the direction from which the original update came.

B . It splits the traffic when you have a large bus (horizon) physical network.

C . It holds the regular updates from broadcasting to a downed link.

D . It prevents regular update messages from reinstating a route that has gone down.

Answer: Option A
A split horizon will not advertise a route back to the same router it learned the route from.

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